How long can the masking fluid stay on paper? Remove the liquid masking fluid the same day. It can stay up to 3 days max before it risks damaging the paper. What if the masking pen tip gets blocked? Remove the tip and rinse with warm water. Let it dry before reusing. Which paints work with the 7 Artists masking fluid? Perfect for watercolour, gouache, or diluted acrylics. A must-have masking fluid for watercolour painting. What surfaces can I use the masking fluid pen on? Best on paper, card, canvas, and primed wood. Not recommended for textiles or ceramics. Ideal for clean edges. How should I store my watercolour masking pen? Store flat, loosen the tip slightly and wipe regularly. This keeps your art masking fluid ready to use anytime.
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